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Researcher at Google
Elie Bursztein
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Articles, softwares and blog posts related to captcha
captcha
Text-based CAPTCHA Strengths and Weaknesses
Based on sucessfull attacks on 13 of the most popular captchas schemes we show how to attack text-based captchas and provide guidelines on how to design secure ones.
@CCS 2011
captcha
offensive technologies
study
medias:
2
captcha
The Failure of Noise-Based Non-Continuous Audio Captchas
We show how using a generic approach, based on advanced audio processing and machine learning algorithm, our captcha breaker "Decaptcha" is able to break all the popular audio CAPTCHA schemes, including Microsoft and Yahoo.
@S&P 2011
captcha
web security
machine learning
medias:
2
captcha
How Good are Humans at Solving CAPTCHAs A Large Scale Evaluation
We perform a mass-scale user study on how people react to the 21 most popular captcha schemes (13 images, 8 audios). This study reveals that even the most popular captchas scheme are often difficult for humans, with audio captchas being particularly problematic.
@S&P 2010
captcha
study
web security
medias:
2
captcha
Decaptcha Breaking 75% of eBay Audio CAPTCHAs
This paper shows how Decpatcha is able to break eBay captchas with 75% accuracy. We show that using a custom breaker (75%) greatly out-perform state of art speech recognition system (1%)
@WoOT 2009
captcha
machine learning
web security
medias:
2
About me
Researcher at Google, specializing in Internet security and privacy.
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